ProgrammableAC/DC Electronic load

Chroma’s 63800 Ser ies AC/DCElectronic Loads are designed for test-ing uninterruptible power supplies, ACsources and other power devices suchas switches, circuit breakers, fuses andconnectors. The power rating, parallel-ing and synchronization capabilit iesmake the 63800 an ideal tool for highpower AC test simulation.

The 63800 Loads can simulate highcrest factor and varying power factorload conditions with real time correctionbase on voltage distortion. These spe-cial features provide real world simula-tion capability and prevent over-stress-ing that allow AC products to be testedautomatically and reliability.

Equipped with unique timing measure-ment functions, the 63800 Loads allowusers to measure the battery dischargetime, the protective time for fuse andbreaker and UPS life cycle .

The 63800 Loads include voltage andcurrent readback capability allowingusers to observe the AC load currentand output voltage of either discretelywith via oscilloscope using analog out-puts. In addition, the load provides TTLsignals to control external relays forshort circuit (crowbar) testing.

The 63800 Series AC/DC Loads alsoprovide necessary measurement func-tions along with GPIB & RS-232 inter-faces for the most demanding engineer-ing tests and ATE applications.

Other features of the 63800 Loadsinclude built in fan speed control tominimize audio noise, internal self-diag-nos is f i rmware and fu l l protect ionagainst over-power, over-current andover-temperature.

MODEL 63800 SERIES

Key Features :

Power Rating:

1500W, 45000W

Voltage Range: 50V - 350Vrms

Current Range: Up to 45Arms

Frequency Range: 45 to 440Hz,

DC

Real time power factor correction

prevents over-stressing

Crest Factor Range: 1.414 to 5.0

Power Factor Range: 0 to 1

CC,CR,CV,CP load modes

Master/Slave parallel control

mode for single or three phases

UUT

Voltage & Current Monitoring

Timing Measurement Function for

Battery, UPS, Fuse and Breaker

tests

100 user programmable sequences

via front panel for user friendly

operation

Measurement: V, I, PF, CF, P, Q

S, F, R and Ip-/+

Short circuit simulation

Full protection: OP,OC,OV and

OT protection

GPIB & RS-232C interfaces

PROGRAMMABLEAC/DC ELECTRONIC LOADMODEL 63800 SERIES

Model 63802

1.Application Specific Load Simulation

The operating frequency range of the 63800 Loads is 45Hz to 440Hz as well as DC. Modes included are constant cur-rent, constant resistance, constant voltage and constant power as depicted below.

When testing constant voltage devices like UPSs and AVRs, CC and CR modes are helpful in verifying these devicesremain stable and/or within regulated limits under different current & resistance load settings.

When testing battery chargers or other current source products, the output current changes according to the battery volt-age (i.e. the output current varies with the output voltage). In these cases the loads CV mode is designed to forcechanges in output voltage allowing the load to be used to test battery chargers for correct charge current and batteryvoltage very precisely.

In the case where the device under test is a battery or fuel cell, the 63800 load can simulate the behavior of variousloads which these devices might be designed to drive. Many of this loads have power consumption patterns which areconstant power in nature. Consequently, the Load CP mode is designed to simulate these load types and is essentialfor battery discharge loading.

2.Crest Factor & Power Factor with real time correction

The specification range of CF is 1.414 to 5.0 and PF is 0to 1 lead or lag (limited by crest factor). The 63800 loadcontrols power factor by shifting the current relative to theinput voltage to generate a displacement power factor. Ifthe PF programmed is positive it will be a leading PF,negative programmed values result in a lagging PF.

The CF & PF control is only used while in CC or CPmodes with the operating range limit as figure 1. Forexample, for a programmed crest factor of 1.414, thepower factor allowed is only 1 assume that the input volt-age is 350Vrms sine-wave. However, for a programmedCF of 2.0, the PF may range from 0.608 to 0.85, for a pro-grammed CF of 3.0, the PF may range from 0.211 to 0.6and so on. Thus, if a higher desired power factor thelower the range of crest factors, and vice versa.

Note also that when high crest factors are programmedsome UUTs will respond with a distorted voltage wave-form (see figure 2) which changes the resultant powerfactor. The 63800 AC load is capable to automatically (inreal-time) shift the current waveform to maintain thedesired power factor setting, thereby compensating forvoltage distortion of the UUT’s output.

Figure 1:Crest Factor vs.Power Factor control Range

PF

CF

Figure 2

CF =Ipk/ I rmsPF =Act ive Power/Apparent power

3.User Programming sequences

The 63800 AC/DC Load includes 100 user programmable sequences with a time range from 10ms to 24 hour and countfrom 0 to 65535. A user friendly front panel input with power factor & crest factor control and GO/NG inspection forsemi-automated test applications is also included. These features assist in many kinds of testing including UPS tran-sient load simulation, high inrush current generation, short testing, engine start-up loading simulation, battery automateddischarging, fuse and breaker life cycle testing and many others.

4.Master / Slave parallel control

When higher power levels or three phase operations is required, the 63800 loads may be used parallel or combined for3-phase loading. The 63800 loads allow for Master / Slave control mode whereby users only need to program the mas-ter unit; and slave units are automatically scaled and controlled by the master. In short, this allows several load units towork as a single load simplifying operation dramatically.

5.Comprehensive Measurements

Chroma’s 63800 Series AC/DC Electronic Loads includes built-in 16-bits precision measurement circuits and firmwareutilities to measure the steady-state and transient responses for true RMS voltage, true RMS current, true power(P),apparent power(S), reactive power(Q), crest factor, power factor and peak repetitive current . In additional to these discrete measurements, analog outputs for voltage and current are provided as a convenientmeans of monitoring these signals via an external oscilloscope.

The 63800 AC/DC Load also includes unique timing measurement function allowing for time ranges between 0.1ms to99999s. This feature allows users to set the final voltage & time out value to measure battery discharge time,A triggervoltoge can be set to measure the protective time of fuse & circuit breaker testing and UPS life cycle time record.

6.Timing Measurement

7.Panel Overview

1. LCD Display:

For Setting and measurements read back.

2. Function key:

To select load mode, control mode, and system

config setting.

3. Numeric key: For data setting.

4. Cursor key: For setting and editing.

5. Power switch

6. Rotary knob:

It adjusts the loading and parameter setting.

7. Voltage sense terminal

8. Current monitor output:

Analog output to indicate the current waveform.

9. Voltage monitor output:

Analog output to indicate the voltage waveform.

10. System I/O:

Synchronous signal for master/slave parallel control

11. TTL I/O:

For system input/output control signal

12. System Bus:

For master/slave control system data communication

13. GPIB connector

14. RS-232C connector

15. AC Input connector

16. AC input voltage switch

17. Load terminal

• • • •

2 4

6

3

5

1

8 1097 11 12 13 14

15 16 17

3. System Integration

Chroma 63800 AC/DC Electronic Loads have GPIB, RS-232C and PC controllable interfaces. Additionally, externalload ON/OFF by TTL signal, AC-ON signal output with /fault out signal and voltage / current monitoring capabilities makethe 63800 Loads ideal for integration into automatic test system.

2. Battery Test with Discharge Time Record

Since power consumption patterns of most electronic devices are typical constant power in nature, Chroma's 63800Electronic Load contant power mode is ideal for battery testing allowing for precise control & measurement of dischargeloading with time record.

1. UPS & AVR Testing

Uninterruptible Power Supplies (UPSs) and Auto Voltage Regulators (AVRs) are known as safe-guard systems. The63800 is designed to provide precisely controlled non-linear loads with programmable crest factor and power factor toreplace resistive load banks for testing these devices. This technology allows real world test conditions to be reliablyand repetitive applied which are not possible with passive resistive loading.

APPLICATIONS

Relays,Switches Testing

Avionics Testing of Military and Aircraft

TransformersTesting

Breakers, Fuses Testing

UPS/AVRTesting

CC MODE

CP MODE

CC MODE

CP MODE

Specifications

PPRR

OOGG

RRAA

MMMM

AABB

LLEE

AACC

//DDCC

EELL

EECC

TTRR

OONN

IICCLL

OOAA

DD

PROGRAMMABLE AC/DC ELECTRONIC LOAD

Power 1500W 4500W

Current 0 to 15Arms (45Apeak) 0 to 45Arms (135 Apeak)

Voltage 50 to 350Vrms (500 Vpeak) 50 to 350Vrms (500 Vpeak)

Frequency 45 to 440Hz, DC 45 to 440Hz, DC

Constant Current Mode

Range 0 to 15Arms, Programmable 0 to 45Arms, Programmable

Accuracy 0.1% + 0.2%FS 0.1% + 0.2%FS

Resloution 1mA 3mA

Constant Resistance Mode

Range 7.5 300 /300 3K 2.5 100 /100 1K

Accuracy 0.5% + 0.5%FS 0.5% + 0.5%FS

Resloution 20 u mho/ 2 u mho 50 u mho/ 5 u mho

Constant Voltage Mode

Range 50~350Vrms, Programmable 50~350Vrms, Programmable

Accuracy 0.1% + 0.2%FS 0.1% + 0.2%FS

Resloution 100mV 100mV

Constant Power Mode

Range 1500W, Programmable 4500W, Programmable

Accuracy 0.1% + 0.2%FS 0.1% + 0.2%FS

Resloution 0.375W 1.125W

Crest Factor

Range 1.414 to 5.0, Programmable 1.414 to 5.0, Programmable

Accuracy 1%FS 1%FS

Resloution 0.005 0.005

Power Factor

Range 0 to 1, Programmable 0 to 1, Programmable

Accuracy 1%FS 1%FS

Resloution 0.001 0.001

DC Mode

Voltage Range 7.5V to 500V 7.5V to 500V

Current Range 0A to 15A 0A to 45A

Min. operating voltage 7.5V 7.5V

Rise time 75 us 75 us

Operating Mode CC, CV, CR, CP

Short Circuit Mode Max. Current @50ms

(TTL indicates high/ low when the short key is set on/off)

Display Dot matrix 240x64, graphic mode (text mode at 1st stage)

Measurement

DVM Range 0.0 to 350.0Vrms 0.0 to 350.0Vrms

DVM Accuracy 0.1% + 0.1%FS 0.1% + 0.1%FS

DVM Resloution 10 mV 10 mV

DAM Range 0.0 to 50.00Arms 0.0 to 150.00Arms

DAM Accuracy 0.1% + 0.1%FS 0.1% + 0.1%FS

DAM Resloution 1.0 mA 2.5 mA

Model 63801 63802

PROGRAMMABLE AC/DC ELECTRONIC LOAD

Vmonitor 500V/10V(Isolated) / 3%FS 500V/10V(Isolated) / 3%FS

Imonitor 50A/10V(Isolated) / 3%FS 150A/10V(Isolated) / 3%FS

Protection OCP:18Arms, OVP:380Vrms OCP: 48Arms, OVP:380Vrms

OPP:1800W, OTP OPP:4800W, OTP

Parallel Ability Yes Yes

Interface External : GPIB, RS-232 , Internal : Can bus, TTL I/O

Line Voltage 115/230 Vac 15% 115/230 Vac 15%

(Pure) Inductive Load No No

(Pure) Capacitive Load No No

Dimension 4U 7U

External load ON/OFF The AC load can be achieved by TTL high signal.

AC-ON When AC Load is on, this pin turns into HIGH and turns into LOW

when the load is off.

/Fault out The voltage level of this pin is HIGH if AC load is in normal state.

It turns into LOW when AC load is in protection state.

(lol) low level output current = +1.25mA max.

(Vol) low level output voltage = 0.5V max.

All specifications are subject to change without prior notice.

Ordering Information:63801: Programmable AC Electronic Load 1500W/15A/350V63802: Programmable AC Electronic Load 4500W/45A/350V

• • • •

V-I Curve Operating characteristics (Typical) of 63800 series

AC mode DC mode

Other Specifications

Model 63801/63802 Model 63801/63802

All specifications are subject to charge without notice.

Distributed by:

Worldwide Distribution and Service Network

63800-931101-2000

Developed and Manufactured by :

CHROMA ATE INC.HEAD OFFICE

66,Hwa-Ya 1st Rd., Hwa-Ya Technical

Park, Kuei-Shan Hsiang, Taoyuan Hsien

333,Taiwan

Tel: +886-3-327-9999

Fax: +886-3-327-8898

http: //www.chromaate.com

E-mail: chroma@chroma.com.tw

U.S.A.

CHROMA ATE INC.(U. S. A.)

7 Chrysler ,Irvine, CA 92618

Tel : +1-949-421-0355

Fax : +1-949-421-0353

Toll Free:+1-800-478-2026

Europe

CHROMA ATE EUROPE B.V.

Max Planckstraat 4

6716 BE Ede, The Netherlands

Tel : +31-318-648282

Fax : +31-318-648288

China

CHROMA ELECTRONICS

(Shen Zhen) Co.,Ltd.

8F, No.4, Nanyou Tian An

Industrial Estate, Shen Zhen,

China, PC: 518052

Tel : +86-755-664-4598

Fax : +86-755-641-9620